When someone's profile pictures on facebook are mostly half naked. (Mainly because they have nothing else to show for) The "yourself" part is because the person OBVIOUSLY chose it as his/ her profile pic. Hence a SELF made decision and not a random tag from a friend.

Nelson: "Take a picture of me so I can add it to my facebook profile pic album."
Travis: "Dude... don't sexpose yourself. Have some dignity. Keep something for later! WE GET IT! YOU ARE HOT!"